Thanks. I'm perfectly fine with losing OEM languages. I only care about British English, Portuguese, and Polish.

If I understand this correctly, I can simply replace and rename the files in the V32 iso. Is that right?

I remember when I was changing American to GB with female voice, all I had to do is make the usa_f.csf file be the gb_f.csf file in the following locations:
V_2/voices/0502
V_2/language/0103
V_2/language/0105

Now, when I go into those folders, I see files like:
D4F.TSF
E4F.TSF
F4M.TSF
GB4F.TSF
I4F.TSF
USA4F.TSF

Does that mean that I have to make, for example, the Portuguese language file into one of the ones above? - In other words, rename it to one of the ones above? - If so, that leads me to my next question. Which 3 of the many languages inside those folders does the MKIV interface recognize and allow me to choose?